Get glossy shading but no reflections (Cycles)
Here I have a sphere reflecting the two objects and environment.


If you don't want an object to be reflected just select it, go to the Object header and uncheck the Glossy box in the Ray Visibility panel.



If you want to see the objects reflected, but without the reflection of the environment, go to the World material settings in a Node Editor and set up the nodes as pictured below.